SystemShield #10 Universal Machine Screw Washer

#10 Universal Machine Screw Washer

Short Description

Compact #10 machine screw washer for machine-fastened grounding, bonding, cabinet, enclosure, and equipment assemblies. Current matching listings for the #10 machine-screw washer class show about 0.199 to 0.209 in inside diameter, 0.433 to 0.443 in outside diameter, and 0.028 to 0.036 in thickness, with steel construction and zinc-plated finish in common supply variants.

Product Overview

The SystemShield #10 Universal Machine Screw Washer is the active compact flat-washer class used in the current SystemShield hardware structure for #10 machine-screw stack-ups. In technical terms, the dimensional class aligns with what suppliers commonly call a #10 machine screw flat washer or machine screw style flat washer. The retained SystemShield name is #10 Universal Machine Screw Washer, but the dimensional identity is the compact #10 machine-screw washer class.

Current supplier listings for this washer class consistently show an inside diameter of 0.199 to 0.209 in, outside diameter of 0.433 to 0.443 in, and thickness of 0.028 to 0.036 in. Those values repeat across multiple sources, which makes the dimensional class stable enough to lock into the catalog.

This washer class is intentionally more compact than the older #10 USS flat washer pattern. Current #10 USS listings show about 9/16 in outside diameter, 1/4 in inside diameter, and 0.036 to 0.065 in thickness, which is materially larger than the compact machine-screw washer class. That distinction is the reason this washer class now replaces the older USS washer in your current SystemShield structure.

This product should therefore be treated as a compact #10 machine-screw washer entry used for controlled hardware stack-ups where tighter OD, tighter clearance, and standard flat-washer load distribution are preferred over the broader USS pattern.

Key Features

• Sized for #10 machine-screw hardware
• Compact machine screw washer dimensional class
• About 0.199 to 0.209 in inside diameter on matching listings
• About 0.433 to 0.443 in outside diameter on matching listings
• About 0.028 to 0.036 in thickness on matching listings
• Commonly supplied as steel with zinc-plated finish
• Smaller OD than the older #10 USS flat washer pattern
• Suitable for use with 10-32 and 10-24 machine-screw systems

Technical Specifications

The values above are locked to the current #10 machine-screw washer dimensional class and should be treated as the active washer identity in the current SystemShield hardware structure.

What’s Included

• (1) #10 Universal Machine Screw Washer
• No screw included
• No nut included
• No lock washer included

Typical Applications

• Cabinet hardware mounting
• Enclosure assembly fastening
• Equipment bracket fastening
• Bonding and grounding accessory mounting where #10 hardware is specified
• Panel hardware attachment
• General machine-thread fastening where a compact washer OD is preferred over the larger USS pattern

Compatibility

Compatible with:

• 10-32 × 1/2 in Phillips Pan Head Machine Screw
• 10-24 × 1/2 in Phillips Pan Head Machine Screw
• Compatible nuts, threaded hardware, and mounting surfaces sized for #10 hardware
• SystemShield Standard Mounting Hardware Kit, where this washer is a primary included hardware component
• Controlled #10 machine-screw stack-ups requiring compact washer OD and standard flat-washer load distribution

Not intended as:

• A split lock washer substitute where spring tension is required
• The older #10 USS flat washer pattern, which is no longer the active washer class in your current system
• A standalone fastening solution without the correct mating hardware

Installation Notes

Use this washer only with hardware sized for #10 fasteners. Confirm that the washer’s inside diameter, outside diameter, and bearing surface are appropriate for the screw, nut, and mounting surface in the actual joint design. Because this compact machine-screw washer class has a smaller OD than a USS washer, it is better suited where tighter bearing footprint or hardware clearance matters.

Final stack-up and torque suitability should be determined by the actual mating materials, hardware arrangement, and application requirements. If a broader load-distribution footprint is needed, that is a different washer class than the one now locked for this product.

Installer should verify:

• hardware size match
• washer OD suitability
• stack-up order
• screw and nut compatibility
• application requirements before installation

Compliance & Regulatory Information

This product is described here as the current #10 machine-screw washer pattern dimensional class based on multiple current supplier listings. Those sources establish the dimensional class and material class well, but they do not create a broader standalone certification claim beyond the washer style and dimensions actually listed.

It should be used only as part of a properly designed assembly and with hardware selected for the actual joint and environment.

Packaging & Handling

• Handle and store in a manner that helps prevent:
• washer deformation
• plating damage
• corrosion from improper storage conditions
• contamination of bearing surfaces

Store in a clean, dry environment before installation. Do not use damaged washers that are bent, cracked, or otherwise deformed.

Notes / Limitations

This product is a fastening accessory component, not a complete assembly.

• Final suitability depends on:
• correct fastener size match
• correct washer pattern selection
• proper hardware stack-up
• proper installation practices
• actual application requirements